lally column screw jack

lally column screw jack


In this blog post, we will explore the fascinating world of lally column screw jacks. These innovative devices play a crucial role in various industries, providing support and stability in a wide range of applications. Let’s delve into the details and uncover the secrets behind these powerful mechanisms.

What is a screw jack used for?

screw jack

  • Construction Projects
  • Screw jacks are extensively used in construction projects, providing vertical support and load-bearing capabilities. They can be found in foundations, bridges, and other structures that require precise leveling and adjustment.

  • Industrial Machinery
  • Industrial machinery often relies on screw jacks to lift heavy loads, adjust conveyor belts, and maintain stability. These powerful devices ensure smooth operation and enhance overall productivity.

  • Automotive Applications
  • In the automotive industry, screw jacks are utilized for various purposes, including lifting vehicles, adjusting height levels in assembly lines, and supporting heavy equipment during maintenance or repairs.

  • Aerospace Industry
  • The aerospace industry benefits from the precision and reliability of screw jacks. They are used in aircraft assembly, positioning satellites, and even in the deployment of landing gear.

  • Theatrical Productions
  • Behind the scenes, screw jacks play a crucial role in theatrical productions. They are responsible for moving heavy stage props, adjusting lighting equipment, and ensuring the smooth operation of elaborate sets.

screw jack

What is the working principle of screw jack?

  • Basic Mechanism
  • Screw jacks operate on the fundamental principle of a screw and a nut. They consist of a rotating screw shaft that engages with a threaded nut, converting rotary motion into linear motion.

  • Multiple Threads
  • To achieve higher lifting capacities and faster speeds, screw jacks often feature multiple threads on the screw shaft and nut. This design allows for greater mechanical advantage and efficient load handling.

  • Worm Gear System
  • Many screw jacks employ a worm gear system, which amplifies the torque and provides self-locking capabilities. This ensures that the load remains securely in place, even when the screw jack is not actively engaged.

  • Lubrication and Maintenance
  • Proper lubrication is essential for the smooth and reliable operation of screw jacks. Regular maintenance and inspection help prevent wear and ensure the longevity of these vital mechanical components.

What is the difference between a screw jack and a hydraulic jack?

While both screw jacks and hydraulic jacks serve similar purposes, there are distinct differences between the two:

  • Mechanical System
  • Screw jacks rely on mechanical force and rotational motion to lift loads, while hydraulic jacks use fluid pressure to generate force and provide lifting capabilities.

  • Load Capacity
  • Hydraulic jacks generally have a higher load capacity and can lift heavier loads compared to screw jacks. However, screw jacks offer more precise and controlled lifting capabilities.

  • Speed and Efficiency
  • In terms of speed, hydraulic jacks tend to be faster, making them ideal for applications that require quick and frequent load adjustments. Screw jacks offer slower but more precise lifting speeds.

  • Power Source
  • Screw jacks can be manually operated or powered by electric motors, making them versatile and suitable for various environments. Hydraulic jacks require a hydraulic power source for operation.

How to choose or customize the right screw jack?

screw jack

  • Load Capacity and Travel Distance
  • Consider the maximum load the screw jack needs to support and the required travel distance. This will determine the size and specifications needed for your specific application.

  • Operating Speed
  • Determine the desired lifting speed and adjustability required for your application. This will help you choose the appropriate gear ratio and thread pitch for optimal performance.

  • Environmental Factors
  • Take into account the operating environment, including temperature, humidity, and potential exposure to corrosive substances. Select materials and coatings that can withstand these conditions.

  • Safety Features
  • Consider any specific safety requirements or regulations that apply to your application. This may include features such as overload protection, emergency stop mechanisms, or position sensors.

  • Budget and Long-Term Value
  • Evaluate the initial investment cost and the long-term value provided by the screw jack. Consider factors such as reliability, maintenance requirements, and the availability of spare parts.

About HZPT

As a leading manufacturer of industrial motors, gearboxes, and drives in China, HZPT is dedicated to technological innovation and superior quality. Our extensive range of products includes:

  • Micro Gear Motors
  • Medium Gear Motors
  • Brake-Speed Adjustable Motors
  • Torque Motors
  • DC Motors
  • NMRV Worm Gear Motors
  • Spiral Bevel Gear Motors
  • WPRV Worm Gear Reducers
  • Rigid Tooth Surface Spiral Bevel Reducers
  • Spiral Bevel Worm Gear Reducers
  • Parallel Shaft Spiral Bevel Reducers
  • Spiral Bevel Gear Reducers
  • Worm Screw Elevators
  • Rigid Tooth Surface Gear Reducers
  • Planetary Gear Reducers

Our transmission products are widely used in various industrial production lines, including transportation machinery, food machinery, medical equipment, printing machinery, textile machinery, packaging machinery, office equipment, and instrumentation. HZPT is your preferred partner for automation equipment.

Why choose HZPT’s screw jack?

screw jack

  • Superior Quality
  • Our screw jacks are manufactured using high-quality materials and undergo rigorous testing to ensure exceptional performance and durability.

  • Precision Engineering
  • With our advanced manufacturing processes and precision engineering techniques, we deliver screw jacks that offer precise positioning and reliable load handling.

  • Customization Options
  • We understand that each application has unique requirements. Our team of experts can work with you to customize screw jacks that meet your specific needs.

  • Reliability and Safety
  • Safety is our top priority. Our screw jacks are designed with built-in safety features and undergo comprehensive quality checks to guarantee reliable operation.

  • Exceptional Customer Support
  • At HZPT, we value our customers and are committed to providing excellent support throughout the entire process, from product selection to after-sales service.

Contact us today to explore the full range of our screw jacks and discover how HZPT can meet your industrial needs. Join the ranks of satisfied customers who rely on our top-quality products and outstanding service.


Find us

Ep Screw Jack Co., Ltd.

Mail: [email protected]

As one of leading manufacturers, suppliers and exporters of mechanical products in China, We offer reducers, sprockets, industrial and conveyor chain, belts, pulleys, gears, racks, gearboxes, motors, PTO Shafts, taper lock Bushing, vacuum Pumps, screw air compressors and many other products. Please contact us for details.